I04 BRITISH ICHNEUMONS. 



last three segments and generally apex of fourth in S , clear white ; post- 

 petiole very closely and finely punctate throughout, carinae distinct, apical 

 angles depressed and obtusely rounded ; second segment with basal and 

 apical incisures deep ; gastrocaeli small, striate, circular and deeply 

 impressed. Legs stout, black; front femora, tibiae and tarsi, and base 

 of posterior tibiae reddish ; tibiae distinctly spinulose ; hind coxae very 

 finely and closely punctate, grey haired and without scopulae. Wings 

 sub-hyaline; tegulae, which bear white dots in S, radix, nervures and 

 stigma, piceous, this last basaliy ferrugineous ; areolet somewhat large ; 

 radial nervure externally curved. Length, 7-8 mm. 



Very like B. vestigator and B. lepidiis in the colour of the scutellum 

 and anus, but the abdomen is broader, the three basal segments much 

 more finely punctate, with the gastrocaeli and thyridii larger; the thoracic 

 costulae in the female are obsolete or wanting, and the head is clothed 

 with short, dense, greyish white pubescence, and is closely and very finely 

 punctate ; sternauli wanting ; legs stout, all the tibiae distinctly spinose ; 

 the male differs from B. vestigator in the shorter silky pubescence of the 

 mesosternum, and in the facial orbits being more broadly, with the sides 

 of the clypeus, white. 



It is probably a not uncommon species with us, though I know 

 of no records, beyond my own capture of a female on Angelica sylvestris 

 flower, at Matley Bog, in the New Forest, in August ; on the Continent 

 it is very widely distributed, and has been bred from Hadena adusta, 

 by Brischke. 



ICHNEUMON, Linnaeus. 



Linn. S. N. ed. i (1735), partim ; Wesm. Nouv. Mt^m. Ac. Brux. 1844, p. 18, 

 partim ; Thorns. O. E. 1893, 1911. 



Head with genal costa inflexed, clypeus not dentate centrally at the 

 apex, facial arch below the antennae not separated, but with a distinct 

 inter-antennal tubercle. Areola sub-quadrate, rarely transverse, sometimes 

 twice longer than broad, the sides always nearly straight, the posterior 

 margin not arcuate but truncate, or somewhat deficient centrally, always 

 rectangular. Abdomen with the central area of the post-petiole nearly 

 always striolate, not twice broader than the lateral ones ; thyridii and 

 gastrocaeli of second segment always distinct, large or small ; terebra 

 slightly or hardly extending beyond the apex of abdomen. Legs with the 

 tibial calcaria rather long, the posterior tarsi sometimes sub-dilated. The 

 head in both sexes with no vertical pale mark, and the external orbits not 

 white. Wings generally with the stigma and nervures pale red. Apex of 

 abdomen in 9 usually, in c^ sometimes, marked with white. Ventral 

 segments two to four with a central fold, on the fourth very rarely distinct 

 at the base only ; dorsal segments two and three not uncommonly red or 

 in the $ flavous, the ventral valvulae not sinuate laterally. 



Of the eighty- two species enumerated by Thomson (op. cii.) we 

 have about thirty -five in Britain, and doubtless many of those recently 

 described only need looking for in collections and in the country to be 

 recorded. 



